1.6
4.2
LTC 2376 and LTC 2377 Connection
Notes:
1. The LTC 2377 provides a COLOR Adjustment menu to
assist initial monitor adjustment.
2. If the video line ends at the system monitor, set the
monitor's termination switch to 75 OHMS. If the video is
looped through the monitor to some other item of
equipment, set the monitor termination switch to HIGH Z
or HIGH IMPEDANCE. The last video in the line must be
terminated with 75 ohms.
3. If the video is to be looped out to other equipment, make
sure that the final item of video equipment on each line is
terminated with 75 ohms.
4. The VCR can be connected to the unit to allow it to
respond to alarms.
5. Do not apply any voltage to any alarm input. It will damage
the unit.
6. Set the host computer to the half-duplex mode.
The LTC2376 and LTC 2377 does not echo received
characters.
Fig. 5: LTC 2376 and LTC 2377 connection
GND
REMOTE
ALARM IN
ALARM OUT
COM 1 2 3 4
NCCOMNO G S
RELAY TRIG
MON
VCR
1
2
3
4
IN
OUT
1
2
3
4
Item
VidQuad Digital Processor
Video Inputs
Camera 1
Video Input 1 - BNC
Camera 2
Video Input 2 - BNC
Camera 3
Video Input 3 - BNC
Camera 4
Video Input 4 - BNC
Video Outputs
Main Monitor
Video MON - BNC
(1)
Quad Monitor
Video VCR OUT - BNC
(2)
Loop-through 1
Video Output 1 - BNC
(3)
Loop-through 2
Video Output 2 - BNC
(3)
Loop-through 3
Video Output 3 - BNC
(3)
Loop-through 4
Video Output 4 - BNC
(3)
VCR Out
VCR IN - BNC
VCR In
VCR OUT - BNC
(4)
Alarm In
Alarm 1
ALARM IN Pin 1
(5)
Alarm 2
ALARM IN Pin 2
(5)
Alarm 3
ALARM IN Pin 3
(5)
Alarm 4
ALARM IN Pin 4
(5)
Common
ALARM COM
Alarm inputs are Class 2 input only.
Alarm input cables must be shielded, and the shield must
be grounded.
Item
VidQuad Digital Processor
Alarm Out
VCR Alarm
RELAY NO (or NC)
RELAY COM
Trigger Out
TTL OUTPUT
Remote
Pin
Function
1
VCR
2
Menu
3
SEQ/
4
Camera 1/Menu scroll
key
5
Camera 2/Menu scroll
key
6
Camera 3/Menu scroll
key
7
Camera 4/Menu scroll
key
8
/
9
Received
10-15
GND
RS-232 protocol
(6)
Data rate
1200 baud
Data bits
8
Parity None
Stop bits
1
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ALM ( )
